Lock-switch.



" Patented Maw-5,1918.

2 SHEETS S HEET I.

' IN VEN TOR.

ATTORNEYS.

MFR/57V}; Cox

w. R; 00x.

LOCK SWiTCH. APPLICATION FILED SEPTJ, 2915.

Patented May 28, 1918.

2 SHEETS-SHEET 2.

IN V EN TOR.

WITNESS I YXZxHHEA/ZZ Cox.

A TTORNE YS.

struction all as and plugwhich ar WAIEEEN B. 36. 1, F GLEVEIUEQIYD, OBIS EGG ewrtron.

reeigeie.

Application filed September I, 1315.

To all whom it may concern.

Be it known that I, WARREN ll. Cox, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Lock-Switches, of which the following is a specification.

This invention relates to a lock switch for the electrical ignition circuit of an automo bile eng'i e, the primary object being to provide suitable means to place the electric switch under key control so that unauthorized parties willbe unable to start the engine or gain access to the interior of the switch.

The presentinvention is an improvement on the device disclosed in my Letters Patent of January 23, 1912, No. 1,015,300. and coinprises a simplified and more eincient conhereinafter substantially shown and described and more particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a front View of the switch without a key, and Fig. 2 is a sectional view centrally of the switch showing a key in place therein to permit operation thereof. nig. 3 is a cross section on line 33, Fig. 2. Fig. 4- is a view corresponding to n 2, but partly in elevation and showing the parts as disassembled. Fig. 5 is a rear view of the switch. Fig. '6 is a face view'ot the front plate, and Figs. 7 and 8 are side and rear views of the shell secured to the front plate. Fig. 9 is a View on line 9 Figs. 10 and 11 are front and side views of the rotatable switch contact member. l2 and 13 are diagrammatic views of the switch and electrical circuit for reversing polarity uses.

The invention comprises a cylindrical casing 2 having a flange 3 at its front adapted to he screwed or otherwise fastened to a stationary body 4, such as the front dash board or cowl frame of an automobile where the device is accessible and in plain view of the operator of the machine. The rear end of casing 12 is closed by a base plate 5 of any suitable insulating material, and a set of four segmental contact strips *3, 7, 8 and 9 are fixed in the form of a circle on the front Specification oi I l-otters Patent.

assembled as shown in Fig. 4.

serial No. 419,249.

face of said plate by screws nuts lit. and separate terminal thninhnuts 12 are also used to make the necessary electrical connections at the rear of the device where protected and concealed behind the hoard l. 5 Base plate 5 has a central recess 13 at its rear and a. diainetrical slot 1% extending hrough to the front face thereof, and this portion of the base plate is adapted to detachahly engaged by a fiat T headed extension 16 0 screwed upon the inner or rear end of the cylindrical plug which is adapted to retate within the shell 1'? forming lined and stationary part 01"" the front plate 18. Shell 1! is a se' arahle part of plate 18 but cured immovable thereto two so which pass th h two coenings plate and is .he circul r shell, the ma n body of rounded and provided wit 2 22 and twolateral rihs23 i length thereof, see and 9. 18 has a central opening 2 of the same shape as the external outline of the shell body and its wing and ribs, and consequently no independent turning movement of the shell is possible when the plate and shell are 18 is detachahly secured to theiron't G} casing 2 by screws 25, and a pair of do on the rear face of the plate e correspondingly located openin it? in the casing to vent 18 from being rotated in the event of unauthorised removal oi? the fastening screws 2 said plate and the parts carried thereh; be separated from the casing only by withdrawal under one condition, that is, when the plug 15 is rotated to place the l headed. extension 16 in alinement with the rical. slot 14. that it may he from the plate 5. Turning of plu controlled by a key 28 which is adapt enter the irregular shaped hey openi the plug and engage the spring pressen transverselg divided locking bolts to, see Fig. 2. The key can not he entered or withdrawn except when the respective divided portions of the bolts are in direct with each .r as shown in 2,

' or the plug, there lating the he is an integral n l l i 1 "3- of dish 34% theplng is limited 0 an 7 and place right or left fro 1 C81 ce of ed the Word. Oil in d tiveterl this purcpose comprising 1 ing' from contact segme ng postop pins are engaggcc s ties spring arm on the ility of dish 8% carried he i when the arm nstiet the ffifitiolllg positions of h who ehy the electric current is vol in opposite directions over citcnit at the election to insni'e even went anal to contact points of the 42. @hvionsly, when in neutral or central I 5 other of the pins good electrical conc is established with the ends segments and 9, or segments 6 and '7 thus bridging gap between the said segments. A laminated. spring siin is secnreo 34: on the opposite of. its clisnietri center, but this arm is split radially e entl and oclaptetl to o feilnp the opposed of segments Y and S, or S anal 9 cle upon the 'tion elected. The llEL other source of cntnent is o 1 lion, t v 28 is insectezl Within central position of the switch ch raises locking maintained by a small sphere o l -l1ett@therigl1t 36 confined between the spring lsininctions 0 l e W ch s 0}- of arm Within relatively smaller openi s i 9 the so therein, the bell projectino gufficign't y t iclnll? butin one rear of the arm so that may enter cl lead of COlTlG to rest Within the do on center of '1 tween. the ments sures a snappy e in the insnin sures a positive contact pc in all of its working pom The switch. member co and arms sion at In this W on which is 25 the switch it, 1162 access gained to the inasingg, without the "proper Key. tini oncl 35 is a or member, held in working position 0 having a lasso extension 16 cntl tie encl of 1 i at its rea wien the front plate 13 11'3 acts upon hzse 1,. en;- casing '2. The spring arms or ssicl casing, and a l ce}?- bowecl normally, but straighten device cerriecl by seicl less when the parts are L; l a shell s rotat -ole ing the switch ineinhei uncle; tension OT ob A A wqh locking extension to? pressure. However, this book the ea e. em a tlisl: of insulating; material removed purposely Tom the rotzitshle nug loosel sleevetl npon saicl extension in thrust 15 and its extension 16 and to engagement. with ssifl shell encl having the stationary shell 17 by placing the tlish'S l so. engaged with said switch con in hearing engagement, with the face i the shell Where radially cxtcnclet lay Wing" 2. A cylindrical casing having a base 22 and ribs The flanged hescl 38 of the plate, a set of switch cont-acts upon said base flat QXLQDSlOIl 16 holtls the said plug wilhin plate-in clislt having spring arms aclapteel to the shell so that it may cl "y 'Witho it "age said contacts, a cover plate for ssi unnecessary plot, and l 1 shell n'l'lixed to said casing encl cent-rally at its front to house 1 l mg (lisin locking bolts and n with snliicient clearance all EllOtl'flt'l i" 1 le 1 lug" Within said shell. a flat extenno entl pressure is brought hes o 101' gp'gl lug h i ga lockingextremloy preventing the bolts for the plug and the key from s The opening 39 extending through is Hot sitlecl to conform to the en sothst turning movement may he i soicl hose plate enrl said clisk ate lasing insulating material J insulate saicl switch contacts lTOHl all of other parts 3. An electric switch comprising a base plate having contact segments thereon, a cylindrical casing having a cover plate and shell thereon, arotatable plug in said shell I having a fiat extension, a disk of insulating material having spring contact arms to engage said segments and provided With a central slot sleeved upon said extension, said spring arms being under constant tension to press said disk against said shell Without 1 end pressure against said plug.

In testimony whereof I afiix; my signature in presence of two Witnesses.

WARREN R. COX. 

